Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 0 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 5 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 10 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 30 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 60 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 90 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 120 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 220 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 300 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 360 min Spectrum MIR absorbance spectrum of Portlandite at 0°C under 1bar CO2 gas mixed with ambient air - 420 min